GE Masoneilan 4700E, Руководство по обслуживанию

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Electrical Installation of 4700E/4800E
Electrical connections should be made as shown in Figure 12. The terminals will accept wire sizes
up to AWG 14.
The loop controller driving the positioner must be capable of supplying 4-20 mA with an output
voltage compliance of at least 5 VDC.
The available output voltage of a current source is reduced by loop wiring resistance. This can be
checked by connecting a resistor of value (250 Ohms + Loop Resistance) across the output of the
controller and verifying that at 100% controller output 20 mA is obtainable.
CAUTION
Do not use a voltage source to drive the positioner as it may
cause permanent damage.
CAUTION
The positioner must be installed in accordance with local and
national codes of practice in both general purpose and hazardous
area locations. The electrical components are fully isolated from
ground and therefore grounding is unnecessary for functional
purposes. Grounding may be necessary to conform to installation
codes.
The positioner is normally supplied with a 1/2" NPT conduit entry.
(M20 is optional) Internal and external ground terminals are
provided for use if grounding is required.